reactors

/R IY0 AE1 K T ER0 Z/
noun
  1. 1

    A person who responds to a suggestion, stimulation or other influence.

  2. 2

    (industrial) A structure used to contain chemical or other reactions.

  3. 3

    A device which uses atomic energy to produce heat.

  4. 4

    A chemical substance which responds to the presence or contact with another substance.

Source: https://en.wiktionary.org/wiki/reactor, https://en.wiktionary.org/wiki/reactors